Why doesn't realpath work on CentOS?

Question

PHP

A simple autoloader that worked for me on Windows:

spl_autoload_register(
    function($class_address)
    {
        $path = __DIR__ . DIRECTORY_SEPARATOR . $class_address . '.php';

        require_once realpath($path);
    },
    true, true
);

Filled everything on CentOS - it gives an error that the class was not found. I'm starting to understand:

$path = __DIR__ . DIRECTORY_SEPARATOR . $class_addr . '.php';

        echo 'Original path is: ', $path . PHP_EOL;

        $path = realpath($path);

        echo 'After realpath: ' . var_export($path, true);

Original path is: /var/www/vendor/asoft\kernel\Kernel.php
After realpath: false

That is, realpath on Linux does not chew backslashes. What the heck? After all, the function was specially created to convert slashes to those needed for the current environment (on Windows, / was converted to \).

Answer 1

And where is it written that realpath should fix slashes?
On Linux, it is quite normal to have a file named "\kernel\Kernel.php"